CONFIG_SCSI_FDOMAIN (not configurable)

modulename: fdomain.ko

configname: CONFIG_SCSI_FDOMAIN

Linux Kernel Configuration
└─>Device Drivers
└─>SCSI device support
└─>SCSI low-level drivers
└─>SCSI_FDOMAIN
In linux kernel since version 5.1 (release Date: 2019-05-05)  
source code:
drivers/scsi/fdomain.c